With it being the 4.0 and lower miles It's probably a $6k YJ all day everyday if the shape is as good as you state. A few years ago it could be had for probably $4k or so but the price of low mileage YJs is through the roof anymore. That being said you are from AZ, so rust is not the same issue as I have being from Illinois. Throw KBB/NADA out the window for any 20 year old vehicle, compare it to others in your area for pricing.